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Method for manufacturing drum blank

A blank and wood type technology, which is applied in the field of making drum blanks, can solve the problems of no machining allowance on both sides of the key parts, difficulty in repairing and processing, and affecting the production cycle, so as to solve the problems of easy deformation and save assembly time , the effect of improving production efficiency

Inactive Publication Date: 2012-06-13
JINAN HEAVY MACHINERY JOINT STOCK
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Problems solved by technology

[0003] Drums are widely used in the field of machinery manufacturing, but when the cast steel drum in the 273 pipe rolling mill is being cast, the structure at the bottom of the casting rough is easily deformed, resulting in no machining allowance for the slides on both sides of the key parts, which is necessary for later repairs. and processing have brought great difficulty, increased repair costs, and affected the production cycle

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] As shown in the figure, a method for making a drum blank includes the following steps:

[0026] 1) Make wood molds and core boxes, and make wood molds according to the castings that make double-layer ties at the bottom and middle; wood molds make six core boxes, and make 1 core, core 2, core 3, and core 6 / 4 core boxes, change the loose pieces, and mark them separately;

[0027] 2) Modeling and core making, after the wood type is made, start modeling and core making;

[0028] 3) Close the box, paint the core to close the box after the core is assembled;

[0029] 4) Pouring, pouring in time after closing the box; the pouring temperature is 1570°C, and the pouring time is 150S. During the pouring process, slow down and pour when pouring reaches one-third of the riser;

[0030] 5) Put the thermal insulation covering agent; the initial additi...

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Abstract

The invention discloses a method for manufacturing a drum blank, belonging to the technical field of casting. The method comprises the following steps of: making a wood mould and a core box, namely making the wood mould according to a casting of which the bottom part and the middle part are provided with two layers of reinforcement bars; shaping and making a core after finishing making the wood mould; after assembling the core, painting a coating and closing the box; after closing the box, pouring timely; putting a heat preservation coverage agent; after pouring the casting, preserving the heat in a sand mould for 65 hours; clearing, namely shaking out and clearing sand on the surface of the casting and in a cavity away at the expiration of the heat preservation time of the casting; thermally treating, namely annealing the blank at a temperature of between 870 and 890 DEG C after the sand is cleared away, wherein the heat preservation time is 8-10h; and polishing, namely polishing the annealed blank to a designed size and painting. According to the method, the problem of deformation of the conventional drum blank is solved, and the quality of the drum blank is improved greatly.

Description

[0001] technical field [0002] The invention relates to a method for making a drum blank, which belongs to the technical field of casting. Background technique [0003] Drums are widely used in the field of machinery manufacturing, but when the cast steel drum in the 273 pipe rolling mill is being cast, the structure at the bottom of the casting rough is easily deformed, resulting in no machining allowance for the slides on both sides of the key parts, which is necessary for later repairs. And processing has brought great difficulty, increased repair costs, and affected the production cycle. Contents of the invention [0004] Aiming at the above-mentioned deficiencies, the present invention provides a method for making a drum blank. [0005] The present invention is achieved through the following technical solutions: a method for making a drum blank, comprising the following steps: [0006] 1) Make wooden molds and core boxes, and make wooden molds according to the cas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/02B22C9/08
Inventor 张坤田高升于普涟
Owner JINAN HEAVY MACHINERY JOINT STOCK
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